Wick-tube for central-draft lamps.



No. 788,798. PATENTED FEB. 28, 1905. W. A. PENPIELD.

WIGK TUBE FOR GENTRAL DRAFT LAMPS.

.APPLIUATION FILED 1330.30, 1904 No. 783,798, Patented February 28, 1905.

STATES PATENT Nl l n WILLIAM ALLEN PEN FIELD, OF MERIDEN, OONNEOllOUT, ASSIGNOR TO THE BRADLEY 8: HUBBARD MFG. CO., OF MERlDEN, CONNECTICUT, A CORPORATION.

WlICK- -TUBE FOFi CENTRAL-DRAFT LAMP.-

SPECIFIGATION forming part of Letters Patent No. 783,798, dated February 28, 1905.

Application filed December 30, 1904. berial No. 238,895.

To IY/U/ 11171101 it 0971/0077 above and below the groove are struck on cir-- Be it known that 1, WILLIAM ALLEN PEN- cles having different radii, as clearly shown in FIELD, a citizen of the United States, residing Fig. 2. At the time the groove is formed or at Meriden, in the county of New Haven and subsequently a hole 7 is formed in one side of 5 State of Connecticut, have inventeda new and the tube just above the groove. The tube useful improvement in Vick-Tubes for Oenthus grooved and punched is placed in suit tral-Draft Lamps; and Ido hereby declare the able dies and the tube contracted lengthwise, following, when taken in connection with the which forces the groove upward or the upper accompanying drawings and the letters of portion of the tube downward, so that the 5 5 reference marked thereon, to be a full, clear, bend in the metal forming the groove 3 exand exact description of the same, and which tends upward, or, in other words, the curved said drawings constitute part of this specificaportion 5 overlaps the inclined surface (5, so tion, and represent, in to form an internal trough 8, as shown in Figure 1, a side view of ablank from which Fig. 3. Any oil which may pass over the I 5 my improvedinner wick-tube is formed; Fig. upper edge of the wick-tube owing to weep- 2, a side view, partially in section, illustrating or any other cause will follow down the ing one step in the production of my improved inner surface of the tube to the trough 8 and tube and showing the same before the tube is escape through the hole 7 into the lamp-font longitudinally contracted; Fig. 3, a side view, or against the surface of the wick below its 5 2O partially in section, of the finished wick-tube, upper edge. By a very simple operation, showing the integral drip-trough. therefore, I am enabled to form adrip-trrmgh This invention relates to an improvementin inside the inner wick-tube and without insertwick-tubes for central-draft lamps, and paring additional pieces therein and avoid solderticularly to such as are provided with soing or other attachments which have hereto- 7 5 called drip-troughs-that is, provision infore been necessary.

side the tube to return any oil which may Having fully described myinvention, what overflow the upper end of the tube back into Iclaim as new, and desire to secure by Letters the font. In the more general construction Patent, is

of troughs a separate piece is insertedinto the 1. An inner wick tube for central-draft 3 tube and secured therein. lamps havlng a drip-trough formed integral The object of this invention is to form the with the body portion of said tube and located trough in the same piece with the inner \vickinside the same, substantially as described. tube and as will be more fully hereinafter de- 2. An inner wicktube for central -draft scribed, andparticularly recited in theclaims. lamps comprising a tube having an annular 8o 35 In illustrating my invention I have shown groove formed in the outer face thereof, the only the inner wick-tube of a central-draft metal forming said grooveextcndinginwardly lamp, the invention being applicable to cenand upwardly below the upper end of the tral-draft lamps of various types. tube, portions of the tube above and below In carrying out my invention I employ a said groove arranged in the same plane where- 8 5 4 tube 2, in which I form near the top an annuby a drip-trough is formed within the tube lar groove 3, forming a corresponding interand integral therewith, substantially as denal shoulder 4, the metal above the groove bescribed. ing turned abruptly inward, forming a short 3. An inner wick-tube for central draft curve 5, while the metal below the groove lamps comprising a tube having an external 45 gradually merges into a main portion, formgroove and acorresponding internal shoulder, ingalongtaper6. In other words, the curves the metal above the groove turned abruptly up ward, and the met-Lil below the groove graduspecilication in the presence of two subscribelly tapered downward, said shoulder extending witnesses.

ing inwardlyand upwardly above said abrupt bend, whereby a drip-trough is formed inside WILLIAM ALLEN PENFIELD' the tube and from a single piece of metal, sub- WVitnesses: I stantially as described.

In testimony whereof I have signed this WILLIAM A. HALL, C. D. NEWBURY. 

